It sounds to me that you have several failed updates, and should have reverted to your backup, before trying again. Because now you most likely have missing database updates etc., which can be tricky for you to fix on your own.

The update problems is most likely related to your hosting.

If you add your system info, and the update steps taken (version to version, and where it failed first time), some kind soul might be able to help you. Else you might need to rebuild your store, and in future be careful taking backups etc.

https://arastta.org/docs/user-manual/tools/system-information

UPDATE, the manually input routes did not save.

My appologies for the numerous replies. Everytime I hit reply the page did nothing

When I go into the security setting there is nothing in the CSRF routes field. When I add the list in that you have suggested I get a "Warning: Please check the form carefully for errors!" message at the top of the screen.

And I am still getting a "Warning: in_array() expects parameter 2 to be array, null given in (...catalog event app csrf.php) on line 27" at the top of all of my pages as well as during checkout.

For whatever reason I also had issues with the upgrade to 1.5. It seems like it partially updates and then doesn't update. For upgrading to 1.6 I remember it coming up with an error that the upgrade could not be completed then I ran it again and it said that the upgrade was successfully installed.

I had to remove the / out of the paths to allow the post to go nthrough

What exactly do you mean, is the routes field empty?
Did you delete them?

By default the suggested routes is added for a new/updated store, as you can see if you install a demo/test site, where you also can see that the checkout indeed works fine.

account/address/edit

account/edit

account/newsletter

account/password

affiliate/edit

affiliate/password

affiliate/payment

Maybe you in feature could be kind and post all relevant info directly, and not one by one sentence per post.

I believe that the lack of CSRF routes is causing the current errors with my webpage and not letting people to checkout

Yeah, the documentation section needs some updates for 1.4+ features, and some older limited docs needs additions too.

Maybe some users, good at writing docs, could contribute to it by time ...