[SOLVED] Blank screen while using Search criteria in user list

My created user list shows fine all 193 members. Problem is when a user tries to search for one or two of the two search criterias. Result is a completely empty white tab. While searching with "No preference" brutto list of all 193 members shows, as expected. Any other choice shows the empty screen.
This didn't happend before my update from CB 1.9 to now CB 2.0.5.
Joomla! version is still the same 2.5.28, but CB update was a preparation before migration to J3.

From backend Parameters / Search tab I chose -
Searcable fields: Wanted <Specific searchable fields>, but the others are tested with same result
Fields to search: 2 specific fields selected
Search criteria: Simple Exact match: Only 'is' and ranges
Hide Empty Searches: Both <Yes> and <No> is tested
Collapse Search Criteria: Both <Yes> and <No> is tested

Can anyone recognize the problem and explain what is wrong?

What type of field are you trying to search? Your userlist is set to exact matching so partial searches will not match. If you're using a multi type field (e.g. multiselect or multicheckbox) and you search for 1 value then it will only match users who have selected that only value. You may want to change your userlist to simple search any so partial matches will work.

The two fields I'm trying to search are both drop down(multiselct) type.

I just realize that if "Hide Empty Searches" is set to <Yes>, then nothing is shown on the list. But hompage screen is visible with list description and search criteria shown. Also counter is shown with the counted search result "0" is shown.
If set to <No> the full list is shown. Conclusion: My search is empty?

Maybe I'm not understanding you correct, but I believe having already tried simple search:
Parameters/Search is set to "Simple Any word match: Only 'Any of' and ranges(Warning can be slow)".
Also the two other possible search criterias are tested:
"Advanced: all possibilities(Warning can be slow)" and
"Simple Exact match: Only 'is' and ranges"

What really seems od is that I don't have an empty list with list description, counter and list selector - but a complete empty screen all withe?

If your userlist is simple search "is" instead of "any" and you search a multiselect then it is a 1-1 match. Meaning if you search Bob and the user has Bob and Tom selected your search will give no results. You have to use simple search "any" to do partial matches like that. Specifically edit your userlist within CB > List Management and under Parameters > Search set "Search criteria" to "Simple Any word match: Only 'any of' and ranges (WARNING: can be slow)".

If you're getting a completely blank page. No HTML or anything then you likely have an error present. Enable debug mode and maximum error reporting in Joomla global configuration then retest to expose the error.

Hi Kyle,
thank you for your patience and instructions.

I have the search setting parameters as you describe - and also completely blank screen, so there must be an error.

After enabling debug mode and setting error reporting to maximum, I tested an had the failure message:
"Fatal error: Call to undefined function getChildGIDS() in /home/spejdernesgenbrug/public_html/components/com_comprofiler/plugin/user/plug_cbprivacy/cb.privacy.php on line 667"

Do you have an idea of what that means and what I can do to correct the failure?

Your CB Privacy plugin is out of date. Please upgrade your plugins based off our plugin compatibility page below.

www.joomlapolis.com/cb-20-addon-status