As written above the modpack crashes on startup, giving the following error:

The game crashed whilst rendering overlay
Error: java.lang.NullPointerException: Cannot invoke "me.codexadrian.tempad.TempadClientConfig.renderBlur()" because the return value of "me.codexadrian.tempad.TempadClient.getClientConfig()" is null

Full crash report: https://pastebin.com/2UszY4pB

The Minecrfat loading window pops up as purple abd black (instead of the Deep Dark-stuff with the stars as a loading bar) and then crashes. Lots of results on Google too, but just #metoo's and no solution.

I'm going to need a Full Latest.log file please, as that will say what's actually crashing, but Tempad is not the cause here.

Am I assuming correctly that the .zip files contain the "former" latest.log?
As I already downgraded to .26 and the pack doesn't crash on that version.

This mornings log which ends with the crash: https://pastebin.com/icEXYT9h

urh... almost every mod in the pack has duplicate versions in that log, looks like there was some error during your update process then

Could be, gonna update to a new profile and check again. Updated to 1.0.27 from a very outdated version, as I've been away for a few months. Downgrades to .26 and .25 have been working fine.

Will update with the result.

Yepp, looks like it was s.th. gone wrong with the update. New profile starts w/o problems. Thx for checking!