Was this ever resolved? Did you eventually get the package installed? I am getting the same error when trying to install a managed package. BTW, I did log a case with basic customer support and was told they could not help with this particular issue and thus referred me to developer.salesforce.com. Thanks!
deactivate the other tabs which you don't use and install it again
Thanks for your answer
I tried to to detractive some of the tabs still the same error message
Not sure why but try to deactivate some more tabs and see if it works, if not you have to log a case with support
Thanks again, I logged a case to sales-fore support
Was this ever resolved? Did you eventually get the package installed? I am getting the same error when trying to install a managed package. BTW, I did log a case with basic customer support and was told they could not help with this particular issue and thus referred me to developer.salesforce.com. Thanks!