You do not have the correct permission

And when creating the thumbnails with the dropdown function on the page I’m completely logged out with this message

A failure occurred

And the login form beneath this message for every “not” created thumbnail appears

To login again I’ve to delete the cookies from the site. Or use another browser.

Seems like deactivating all plugins and reinstalling nextgen-gallery and then activating all of them solved these issues

And the problems are back after adding some images again, so this is not resolved

When I tried this in another browser (Chrome instead of Safari) this is the message after a while making thumbnails

Bad Request

Your browser sent a request that this server could not understand.
Size of a request header field exceeds server limit.
Cookie
/n

The Server setting is

LimitRequestFieldSize 65535

This should be enough ??

Somehow a cookie gets corrupted making thumbnails and the consequence is I get logged out so making the thumbnails fails

@vakantie Ameland – I believe this may have to do with a very large cookie being created which we are looking into as it is a very rare issue that needs some in-depth review to sort out. Unfortunately I do not have an ETA for this to be corrected at this time …

– Cais.

Yeah seems like it. In both the reverse proxy server and web server I now have put these variables to prevent header troubles, so there is no header issue because of server settings.

LimitRequestFieldSize 65536
ProxyIOBufferSize 65536

Still the error appears after some time creating thumbnails, even after disabling all other plugins so there must me something in the nextgen-gallery creating the cookie. Hope you find the culprit.

Best wishes and happy new year 2016

@vakantie Ameland – We are getting closer to sorting this out …

… thanks, and a very Happy and Prosperous New Year to you, too!

– Cais.

With the update to 2.1.23 the Bad Request message is gone

Still there is You do not have the correct permission and A failure occurred

@vakantie Ameland – What are the specifics of those messages?

– Cais.

When making 50 new thumbnails

You do not have the correct permission occurs after a while on 2/3 of the process

And then when trying to complete the rest this message occurs

Unexpected Error and then I’m logged out

I have to remove the cookies and login again

@vakantie Ameland – Still sounds like a resource limit is being hit … we’re still working on the cookie issue which might be involved with your site’s specific issue as well.

– Cais.

Well the cookie problem is still there, I can only see it in Chrome, in Safari I just get logged out. A lot of X-Event cookies are stored when making thumbnails or scanning folder for new images

Even increasing these parameters does not solve the issue

LimitRequestFieldSize 131072
ProxyIOBufferSize 131072

@christianebuddy – We are still looking into the cookie issue and may have it resolved for the next release of NextGEN Gallery … unfortunately at this time, the only work-around we have seen have some moderate success is to clear the browser cookies each time this happens.

– Cais.