Welcome to the forum.
Your errors are unusual, but webOS in 2014 DOES require the user to make the effort to install homebrew apps and patches to maintain function as external services change or cease. It's not clear which online guide you used, but here are a couple of links:
TIP: preware.net solutions for WOSQI, Preware v1.9.13 | pivotCE
Guide: Coming (Back) to webOS in 2014, Part 1 | pivotCE
Both WOSQi & Preware should work as should the file manager service.
Regarding apps from the official catalogue, some are known to have become outdated (a list is linked in my signature). If you have paid for apps and have receipts, this should be recorded in your Palm Profile and you should be able to download the apps until the final shutdown on January 15th. Purchases should have been possible until November 1st, but not after. Check your ability to download, your receipts and purchase dates and contact HP support if problems remain. Some catalogue apps will be available on other channels in the future.
I would suggest you start over and follow the instructions carefully. If problems continue, post here, detailing precisely what you did and the nature of your problems. Hopefully, they can be resolved.
If you've applied the instructions correctly, this may indicate a fundamental system problem, potentially solvable by reflashing the OS with a webOS doctor, but if the TP works OK in most ways, this is unlikely. There is also a possibility of a hardware fault - again unlikely as your problems seem too specific.
Only you can decide the utility of your TP. If you don't wish to invest time and effort or simply can't fix the problems with webOS, you can try installing Cyanogenmod Android, wait until LuneOS is sufficiently developed or buy a tablet running another system. If you can show that the TP hardware is OK, you can get a good price in the marketplace section of this forum or on your auction/sale site of your choice.