[SOLVED] problem new auto action

Hello
2 Auto actions were created long time ago..
Now I want to create another but I can not. When I go to this address,

administrator/index.php?option=com_comprofiler&task=editPlugin&cid=510&action=autoactions.new

screen is blank

plugin version 5.1.3
CB v. 1.9.1

escalona wrote: Hello
2 Auto actions were created long time ago..
Now I want to create another but I can not. When I go to this address,

administrator/index.php?option=com_comprofiler&task=editPlugin&cid=510&action=autoactions.new

screen is blank

plugin version 5.1.3
CB v. 1.9.1

Please follow blank page debugging instructions from the FAQ page and post back findings.

Hello
thanks for the reply.
I'm no expert, but I followed his instructions.
1.I do not see a significant error in the server log.
2. Debugging Site Co joomla config shows the following
Fatal error Class 'K2Model' not found in / home/luthiers/public_html/administrator/components/com_k2/models/categories.php on line 18
3.I search forum this error and find:

Fatal error: Class 'K2Model' not found in <span>/</span>var<span>/</span>www/vhosts/finalbug.net/httpdocs/administrator/components/com_k2/models/categories.php on line 18
Sounds like you had K2 partially installed or didn't have its system plugin enabled.

I do not have installed K2 nor see a plugin system k2.
How to continue?
Thanks for your help

Solved
I had installed some folders k2.
Reinstall and uninstall K2 has solved the problem.
Thanks again for your instructions