If you have a long url or are using the pre-prop url in Mura and running into issues with it being too long you will need to edit your database to allow for more characters.

To do this in phpMyAdmin for your MySQL database you would first log in and load your database.

Load the Structure for the table 'tsettings'.

Look for the Field 'Domain' and click on edit.

Change the LengthValues to something long enough for your domain and click save.