diff --git a/src/addon/mod/workshop/assessment/accumulative/providers/handler.ts b/src/addon/mod/workshop/assessment/accumulative/providers/handler.ts
index e361727b0..40505af47 100644
--- a/src/addon/mod/workshop/assessment/accumulative/providers/handler.ts
+++ b/src/addon/mod/workshop/assessment/accumulative/providers/handler.ts
@@ -63,8 +63,6 @@ export class AddonModWorkshopAssessmentStrategyAccumulativeHandler implements Ad
             field.dimtitle = this.translate.instant(
                     'addon.mod_workshop_assessment_accumulative.dimensionnumber', {$a: field.number});
 
-            const scale = parseInt(field.grade, 10) < 0 ? form.dimensionsinfo[n].scale : null;
-
             if (!form.current[n]) {
                 form.current[n] = {};
             }
@@ -76,7 +74,11 @@ export class AddonModWorkshopAssessmentStrategyAccumulativeHandler implements Ad
 
             form.current[n].grade = form.current[n].grade ? parseInt(form.current[n].grade, 10) : -1;
 
-            promises.push(this.gradesHelper.makeGradesMenu(field.grade, workshopId, defaultGrade, -1, scale).then((grades) => {
+            const gradingType = parseInt(field.grade, 10);
+            const dimension = form.dimensionsinfo.find((dimension) => dimension.id == field.dimensionid);
+            const scale = dimension && gradingType < 0 ? dimension.scale : null;
+
+            promises.push(this.gradesHelper.makeGradesMenu(gradingType, undefined, defaultGrade, -1, scale).then((grades) => {
                 field.grades = grades;
                 originalValues[n].grade = form.current[n].grade;
             }));
diff --git a/src/addon/mod/workshop/components/index/addon-mod-workshop-index.html b/src/addon/mod/workshop/components/index/addon-mod-workshop-index.html
index 0e2e89af6..2c9f9be19 100644
--- a/src/addon/mod/workshop/components/index/addon-mod-workshop-index.html
+++ b/src/addon/mod/workshop/components/index/addon-mod-workshop-index.html
@@ -127,7 +127,7 @@
                 <ion-item text-wrap *ngIf="!assessments || !assessments.length">
                     <p>{{ 'addon.mod_workshop.assignedassessmentsnone' | translate }}</p>
                 </ion-item>
-                <ng-container *ngFor="let assessment of assessments">
+                <ng-container *ngFor="let assessment of (assessments || [])">
                     <addon-mod-workshop-submission [submission]="assessment.submission" [assessment]="assessment" [courseId]="workshop.course" [module]="module" [workshop]="workshop" [access]="access" summary="true"></addon-mod-workshop-submission>
                 </ng-container>
             </ion-card >
diff --git a/src/addon/mod/workshop/pages/assessment/assessment.ts b/src/addon/mod/workshop/pages/assessment/assessment.ts
index 09b6a1e3f..6c1783e35 100644
--- a/src/addon/mod/workshop/pages/assessment/assessment.ts
+++ b/src/addon/mod/workshop/pages/assessment/assessment.ts
@@ -182,8 +182,8 @@ export class AddonModWorkshopAssessmentPage implements OnInit, OnDestroy {
 
                         if (accessData.canoverridegrades) {
                             defaultGrade = this.translate.instant('addon.mod_workshop.notoverridden');
-                            promise = this.gradesHelper.makeGradesMenu(this.workshop.gradinggrade, this.workshopId, defaultGrade,
-                                    -1).then((grades) => {
+                            promise = this.gradesHelper.makeGradesMenu(this.workshop.gradinggrade, undefined, defaultGrade, -1)
+                                    .then((grades) => {
                                 this.evaluationGrades = grades;
                             });
                         } else {
diff --git a/src/addon/mod/workshop/pages/submission/submission.ts b/src/addon/mod/workshop/pages/submission/submission.ts
index 77d82fec2..1158e5df5 100644
--- a/src/addon/mod/workshop/pages/submission/submission.ts
+++ b/src/addon/mod/workshop/pages/submission/submission.ts
@@ -202,7 +202,7 @@ export class AddonModWorkshopSubmissionPage implements OnInit, OnDestroy {
                 this.workshop.phase < AddonModWorkshopProvider.PHASE_CLOSED && this.access.canoverridegrades;
             this.ownAssessment = false;
 
-            if (this.access.canviewallassessments || this.currentUserId == this.userId) {
+            if (this.access.canviewallassessments) {
                 // Get new data, different that came from stateParams.
                 promises.push(this.workshopProvider.getSubmissionAssessments(this.workshopId, this.submissionId)
                         .then((subAssessments) => {
@@ -259,8 +259,7 @@ export class AddonModWorkshopSubmissionPage implements OnInit, OnDestroy {
 
                 const defaultGrade = this.translate.instant('addon.mod_workshop.notoverridden');
 
-                promises.push(this.gradesHelper.makeGradesMenu(this.workshop.grade, this.workshopId, defaultGrade, -1)
-                        .then((grades) => {
+                promises.push(this.gradesHelper.makeGradesMenu(this.workshop.grade, undefined, defaultGrade, -1).then((grades) => {
                     this.evaluationGrades = grades;
 
                     this.evaluate.grade = {
diff --git a/src/core/course/providers/course.ts b/src/core/course/providers/course.ts
index 1815352ea..bb4a55c5a 100644
--- a/src/core/course/providers/course.ts
+++ b/src/core/course/providers/course.ts
@@ -467,6 +467,8 @@ export class CoreCourseProvider {
     /**
      * Gets a module basic grade info by module ID.
      *
+     * If the user does not have permision to manage the activity false is returned.
+     *
      * @param {number} moduleId Module ID.
      * @param {string} [siteId] Site ID. If not defined, current site.
      * @return {Promise<any>} Promise resolved with the module's grade info.
diff --git a/src/core/grades/providers/helper.ts b/src/core/grades/providers/helper.ts
index 3032f20e3..5df58c9dd 100644
--- a/src/core/grades/providers/helper.ts
+++ b/src/core/grades/providers/helper.ts
@@ -559,18 +559,19 @@ export class CoreGradesHelperProvider {
      * Taken from make_grades_menu on moodlelib.php
      *
      * @param  {number} gradingType     If positive, max grade you can provide. If negative, scale Id.
-     * @param  {number} moduleId        Module Id needed to retrieve the scale.
+     * @param  {number} [moduleId]      Module ID. Used to retrieve the scale items when they are not passed as parameter.
+     *                                  If the user does not have permision to manage the activity an empty list is returned.
      * @param  {string} [defaultLabel]  Element that will become default option, if not defined, it won't be added.
      * @param  {any}    [defaultValue]  Element that will become default option value. Default ''.
      * @param  {string} [scale]         Scale csv list String. If not provided, it will take it from the module grade info.
      * @return {Promise<any[]>}         Array with objects with value and label to create a propper HTML select.
      */
-    makeGradesMenu(gradingType: number, moduleId: number, defaultLabel: string = '', defaultValue: any = '', scale?: string):
+    makeGradesMenu(gradingType: number, moduleId?: number, defaultLabel: string = '', defaultValue: any = '', scale?: string):
             Promise<any[]> {
         if (gradingType < 0) {
             if (scale) {
                 return Promise.resolve(this.utils.makeMenuFromList(scale, defaultLabel, undefined, defaultValue));
-            } else {
+            } else if (moduleId) {
                 return this.courseProvider.getModuleBasicGradeInfo(moduleId).then((gradeInfo) => {
                     if (gradeInfo.scale) {
                         return this.utils.makeMenuFromList(gradeInfo.scale, defaultLabel, undefined,  defaultValue);
@@ -578,6 +579,8 @@ export class CoreGradesHelperProvider {
 
                     return [];
                 });
+            } else {
+                return Promise.resolve([]);
             }
         }