Frankly (it's been mentioned before), the tapatalk extension is an external extension, NOT tested for validation on phpBB and as such no support should be offered on phpBB, whether it's about installation, "extallation" or any problems encountered.
There have been issues with updating and upgrading phpBB installations with tapatalk installed and the solution in most cases was to uninstall tapatalk completely before updating/grading.
It may sound harsh and it's not something I could enforce but I don't even see any point in giving support for a board with tapatalk installed, even when the problem seems to be related to something else. Remove tapatalk completely (and I mean 100% completely) and if the problem remains ... then support is offered and given.
*End of rant*