Registration Failed after installation

[azrulharis]

Facing the problem during registration

Console error
Uncaught SyntaxError: Unexpected token 'e', "error" is not valid JSON
at JSON.parse ()
at Function.parseJSON (jquery-outer.min.js?v=36:3:4322)
at e.parseJSON (jquery-migrate-1.2.1.min.js?v=36:2:2943)
at Object.success (signup:870:43)
at c (jquery-outer.min.js?v=36:3:7857)
at Object.fireWith [as resolveWith] (jquery-outer.min.js?v=36:3:8658)
at k (jquery-outer.min.js?v=36:5:14015)
at XMLHttpRequest.r (jquery-outer.min.js?v=36:5:18226)