While updating from Provar Manager 2.25 to 3.0 your installation could fail.
Because of this error –

1. (Issue_Record_Page) ‘{!Record.Project__r.Release_Management_Tool__c}’ is a picklist field.’Provar’ is an invalid field value.
Issue_Record_Page: ‘{!Record.Project__r.Release_Management_Tool__c}’ is a picklist field.’Provar’ is an invalid field value.

2. (Project_Record_Page) ‘{!Record.Release_Management_Tool__c}’ is a picklist field.’Provar’ is an invalid field value.
Project_Record_Page: ‘{!Record.Release_Management_Tool__c}’ is a picklist field.’Provar’ is an invalid field value.

To resolve this error :-
1 . Go to setup , find Picklist Value Sets in quick find
2. Open Release Management Tools
3.  Add a picklist value named  Provar , check Add picklist to all record types and hit save.

It should look something like this.