I have enabled captcha. From my admin panel I now have the problem that it keeps showing an invalid captcha message even when there is no captcha at the Admin Panel login page.
How can I fix it?
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There is a possibility to enable CAPTCHA for the Admin Panel in
System > Configuration > Advanced > Admin > CAPTCHA and if you have enabled it (by accident) this could be a cache issue. So try the following.
To manually delete all chache use FTP or SSH to delete the following directories (if present)
[your Magento install dir]/includes/src/ [your Magento install dir]/media/css/ [your Magento install dir]/media/css_secure/ [your Magento install dir]/media/js/ [your Magento install dir]/var/cache/
IMPORTANT: Don't delete the entire includes/ media/ and var/ directories, only the subdirectories I mentioned above!
If this doesn´t help check the
core_config_data table in your database to see the value for
admin/captcha/enable. If the value is 1 then Captcha for Admin is enabled. You could change it to 0 to disable it.
IMPORTANT: Always make a backup of your database before making any changes!
My issue is the backend 'web page isn't available'.
So it's better to do by following steps:
1) disable Captcha firstly
mysql> select * from core_config_data where path like '%captcha%'; mysql> update core_config_data set value=0 where path = 'admin/captcha/enable';
2) use another browser to login backend My Chrome can't use, so i use firefox to open and signin from backend successfully.
3) use magento cache tool to flush all caches, and re-enable captcha by following sql or backend.
mysql> update core_config_data set value=1 where path = 'admin/captcha/enable';
My issues has been fixed. Hope it can help others. For all people has different environment the system, hope my experience just can be a reference.