Hi
Try the following steps-
Open Settings:
Go to Settings > Apps > Manage apps.
Find AquaMail:
Locate and select AquaMail.
Grant Permissions:
Tap Permissions and ensure Storage and any other relevant permissions are granted.
Restart App:
Restart AquaMail to apply the changes.
If you still can't find the permissions, consider reinstalling AquaMail or checking if there are any system updates for your phone.
Thanks