maybe give more indication on why or what error, anyway normally the work around is change the password through your database
Solutions:
1. Find “members” in your database and select your username
2. Change “member_login_key” of username to 47ff7d1ab0f8274eead874aae061d6fb
3. now change “members_pass_hash” of username to b69bb93e52ef95297976d84262f79dcd
4. and “members_pass_salt” of username to *ttHZ
5. Login using this 123
or if you want already to paste the new password
md5generator