Please note this is an old forum thread. Information in this post may be out-to-date and/or erroneous.
Every phpxlsx version includes new features and improvements. Previously unsupported features may have been added to newer releases, or past issues may have been corrected.
When unzipping the xlsx, a calcChain.xml exists in the xl folder. Although no more functions exist. Removing this and zipping the file again, leads to a working xlsx.
It seems that the calcChain.xml is not being replaced or edited.