Close and reopen Gmail
If Gmail is not working properly, all you need to do is close your instance of Gmail and open it again. If you’re in a web browser, close the browser, re-open it, and navigate back to the Gmail website. If you are on a mobile device, close the app and restart it.
Use Gmail in another browser
The easiest way to fix this problem is to open Gmail in another browser. If you usually use Chrome like Firefox, open Gmail and see how it works there. If it does this is to see why it is not working in Chrome. There may be times that you need to fix a second time, but at least you can go on with your work. Similarly, if it is not working in the mobile app, then try it open on a browser and see if it is working better there.
Check if Gmail is Down
Sometimes it may happen that the problem is not in your computer or browser, but instead the Gmail service may be offline. To check this, you can check the network status of Gmail on downdetector or search ‘this Gmail down’ in Google search. If any service is bad you should wait for it to be fixed.
If you have run out of storage in your Google Drive account then you may have to face some problems with Gmail, because Google Drive is where your Gmail is stored. Check to see if you are running slow and if so, free up storage.
Check how internet connection you have
Make sure you have a good internet connection via WiFi or cellular. As it may happen that your home internet connection is offline, but the wifi is still strong. Sometimes your mobile device is trying to connect via Wi-Fi but no data is being transmitted. Check to see if other apps or websites are not working properly. If you’re on a mobile device, you can also turn off WiFi and force your device to use a cell signal.
restart your computer
If you still can’t find any solution then turn off your device. Whether you are using a computer or using an Android smartphone or an iPhone, then restart it. Now try Gmail again. Sometimes restarting the device can fix problems with your memory or with an app or browser.
Enable your browser plug-in
If the problem with Gmail is attributed to a specific web browser, there’s a good chance you’re using a browser extension or plug-in that conflicts with Gmail. You may want to disable your extension and see if that fixes the problem. Disable all your extensions and see if that fixes the problem. If it does, keep trying to start them one by one until you find the problem extension that conflicts with Gmail.
clear your browser cache
Lastly, your browser’s cache may also be preventing Gmail from working properly. To check this, try clearing your browser’s cache and cookies. Like how to clear your cache and cookies in Chrome and if you’re using an iPhone, uninstall the Gmail app and then reinstall it from the App Store. If you’re using an Android device, the steps may be minimal depending on the phone and version of Android you’re running, but the process is the same here:
First of all open the Settings app.
Now tap on Apps & Notifications.
Now go to the list of apps and tap Gmail.
Tap on Storage & Cache.
Tap on Clear Cache.