Wednesday - last edited Thursday
Wednesday
Thursday
@lukevalley: What type of file are you attempting to open? Based on the screenshot, it does appear as though you don't have any applications installed that support the file type you're trying to open. For instance, if you attempt to open a .PDF via My Files, then apps such as Samsung Notes would be recommended. The file type is typically included at the end of the file name, therefore you should make a note of the format, then check the Google Play Store for apps that support that file type.
Thursday
Thursday
@lukevalley: I'm not too sure what you mean. Are you able to detail the steps you're taking which lead to the error message you highlighted in your screenshot?
Thursday
Thursday
@lukevalley: Having looked into this, PojavLauncher appears to have been discontinued due to piracy concerns from both Google and the Minecraft developers. As this would be classed as an unauthorised third party app, I am unable to assist you further.