Lightroom CC 3.5.1 for Android not importing raw files.

Hi, I am using Lightroom CC 3.5.1 for Android on my OnePlus 6. I have Canon 77D and have been using Lightroom for last 2 weeks. But, since yesterday, Lightroom isn't importing raw files. It is importing jpeg all right but not the raw files. Whenever I tried to import raws, it says "import successful" but the files are not shown in Lightroom. Can anyone help in this regard? Thanks in advance.