Hi, Oliver.
First of all, you should Check these Things.
- caused by a WordPress plugin
- .htaccess file.
- caused by file permission in WordPress
caused by a WordPress plugin
you have to deactivate all WordPress plugins temporarily.Then check whether your issue has fixed by deactivating all WordPress plugins. If so, the problem is with one of the security plugins on your WordPress website. so Check one by one.
Fixing .htaccess file
- Connect to the website by using an FTP client
- find .htaccess file (if you want take backup). and Delete it.
- Now, go to wordpress and then go for Settings and then Permalinks page.
- Just click Save button. Then WordPress will create a fresh .htaccess file.
If these things do not work, check the permission in the WordPress files.
Here, all folders on the website should have a file permission of 744
or 755
. Otherwise, it should have a file permission of 644 or 640. Then you can set the file permission to the root folder to 744
or 755
.
Im sure you will fix your Issue. All pictures and tips are credited to fix the 403 forbidden error in WordPress