AXY VALIDATOR REQUIRE ACCESS TO CUSTOM SETTING AND CUSTOM METADATA TYPE.

Our system store your configured Rules in Protected Custom Setting and the library containing the REGEX for them in custom metadata type.

Since v49 (Winter 21) Salesforce version it is required to enable in your Org Setup > Schema Settings for Apex accessing. 

As a workaround if you don’t want to enable our application to access and read our Custom Settings and Metadata Types record. You must assign the Axy Validator User to every user that may run the set rules.