I am really new to Blender, and by the title I mean that when importing/creating a new texture, blender always says that there are missing textures, I have succeeded in painting/importing textures on this same file before, but now it's not working anymore. I have tried the report and find missing files feature, but that does nothing. Any help would be appreciated.
Select your object and go to the shader editor, add an image texture by pressing shift>A and then connect the image texture node into the base color. In the image texture node press open and select your file or just open the dropdown menu and select the file from there. Now go to the texture paint workspace and check. It will not be pink.