diff --git a/src/addons/block/myoverview/components/myoverview/myoverview.ts b/src/addons/block/myoverview/components/myoverview/myoverview.ts
index fa7e2f7fa..4d3a0bc78 100644
--- a/src/addons/block/myoverview/components/myoverview/myoverview.ts
+++ b/src/addons/block/myoverview/components/myoverview/myoverview.ts
@@ -264,8 +264,13 @@ export class AddonBlockMyOverviewComponent extends CoreBlockBaseComponent implem
 
         this.hasCourses = this.allCourses.length > 0;
 
-        this.gradePeriodAfter = parseInt(await this.currentSite.getConfig('coursegraceperiodafter', refresh), 10) || 0;
-        this.gradePeriodBefore = parseInt(await this.currentSite.getConfig('coursegraceperiodbefore', refresh), 10) || 0;
+        try {
+            this.gradePeriodAfter = parseInt(await this.currentSite.getConfig('coursegraceperiodafter', refresh), 10);
+            this.gradePeriodBefore = parseInt(await this.currentSite.getConfig('coursegraceperiodbefore', refresh), 10);
+        } catch {
+            this.gradePeriodAfter = 0;
+            this.gradePeriodBefore = 0;
+        }
 
         this.loadSort();
         this.loadLayouts(config?.layouts?.value.split(','));
diff --git a/src/addons/block/recentlyaccessedcourses/components/recentlyaccessedcourses/recentlyaccessedcourses.ts b/src/addons/block/recentlyaccessedcourses/components/recentlyaccessedcourses/recentlyaccessedcourses.ts
index 6bbad0d5d..9eaa906e6 100644
--- a/src/addons/block/recentlyaccessedcourses/components/recentlyaccessedcourses/recentlyaccessedcourses.ts
+++ b/src/addons/block/recentlyaccessedcourses/components/recentlyaccessedcourses/recentlyaccessedcourses.ts
@@ -135,14 +135,16 @@ export class AddonBlockRecentlyAccessedCoursesComponent extends CoreBlockBaseCom
         const showCategories = this.block.configsRecord && this.block.configsRecord.displaycategories &&
             this.block.configsRecord.displaycategories.value == '1';
 
-        // WS is failing on 3.7 and 3.6, use a fallback.
-        if (!this.site.isVersionGreaterEqualThan('3.8')) {
+        let recentCourses: CoreCourseSummaryData[] = [];
+        try {
+            recentCourses = await CoreCourses.getRecentCourses();
+        } catch {
+            // WS is failing on 3.7 and bellow, use a fallback.
             this.courses = await CoreCoursesHelper.getUserCoursesWithOptions('lastaccess', 10, undefined, showCategories);
 
             return;
         }
 
-        const recentCourses = await CoreCourses.getRecentCourses();
         const courseIds = recentCourses.map((course) => course.id);
 
         // Get the courses using getCoursesByField to get more info about each course.