I found these solutions in their docs, Try these it will help you.
1. No translations are set in Admin
Go-to Admin > Extras > Translations and check if you have at least one translation in place.
2. The translation is in place but is no translation is marked as default.
Go to Admin > Extras > Translations and check if at least one transaction is marked as default. (Click on the CheckMark button on a translation to mark it as a default translation)
3. Removed Firebase Web Push Certificate.
Go to Admin > Settings > Push Notifications > Firebase Web Push Certificate and check whether you have removed the Firebase Web Push Certificate. Even if you do not intent to use Firebase push notifications, this field is not meant to be removed. If you have removed it by mistake, insert the following, and save your settings.
BH5L8XrGsNpki5uF1008FbZzgKKZN-NmhOwdWL5Lxh5r3nsgZ6N_Dged1IYXXCCJwpnrXzs52G_v3vM_naO0hxY
Then go to Admin > Settings > Cache Settings > Force Clear Cache
4. API End Points not configured correctly
If you use a www version of your website during the installation, you might face this issue. Make sure you always use a non-www version of the URL. Go to Admin > Settings > Fix Update Issues
