Okay, I just tested myself a new install using wine version 1.7.17 and I get no errors with both 32-bit wine and 64-bit.
I will try to clear up a bit how you install games using a 64-bit virtual drive. First you should ensure you have both the 32-bit and 64-bit of the same wine version. PlayOnLinux only displays your 32-bit wine versions when you install, so you need to have both variants installed to be able to choose it. You check that you have it installed from Tools --> Manage Wine versions in PlayOnLinux
When you do a custom install, and you reach the wine selection window, select the wine version you want to use
Then when you click Next, you should see this window
And now you can choose to use 64-bit. The rest of the installation process will be just as normal. There is one thing to note though. During the installation of libraries for wine, PlayOnLinux will complain that the signature of the install script is not verified. I suppose this comes from the fact that they don't use 64-bit wine in their scripts so they probably don't support it. Just click that you accept the risks and proceed with the install.
Manjaro is similar to Arch, so I am guessing you may be missing some 32-bit libraries. The best way to check is to see if 64-bit wine works. I am assuming that 64-bit wine will use the normal 64-bit libraries on your system.
Knowing which you may be missing can be difficult. The first and most obvious choices are graphics driver, which you will need for everything anyway. If you're using nvidia, then the lib32-nvidia-libgl package should suffice there.
Otherwise there could be a multitude of packages you might need. I have already installed several apps and many apps pull in lib32-packages as dependencies. I did a little check here, and I have a total number of 84 lib32 packages installed on my Arch system, but only 5 of those have been explicitly installed by the, the rest installed as dependencies. Those I have installed myself are:
- lib32-alsa-plugins
- lib32-fakeroot
- lib32-flashplugin
- lib32-libpulse
- lib32-nvidia-libgl
If you are interested seeing all lib32 packages I have installed on my current system, I have them in a text file attached to this post. Note that you probably don't need all, but I am admittedly at a bit of a loss as to what you might need.
Hopefully your problem is not more complicated than this, but if you're still having problems don't hesitate to post.