Tap the Recents button on your device’s Navigation bar, and then tap Close all to close all of your recent apps.

Navigate to and open Settings, then tap Device care, and then tap Storage. You’ll see the current available storage under Internal storage.

If needed, you can tap Trash, Unused apps, Duplicate files, or Large files at the bottom of the screen to remove excess data and free up space.

Navigate to and open Settings, and then swipe to and tap Software update or System updates. It will vary between models.

Tap Download and install, Check for system updates, or Check for software updates, depending on your carrier. If an update is available it should begin downloading automatically, although you may need to tap Download now on some devices.

When the download is complete, follow the on-screen instructions to install the update.

Navigate to and open the Play Store, then tap your profile icon in the top right corner, and then tap Manage apps & device. Tap the Manage tab, then tap the filter icon (it looks like three lines), and then make sure Recently updated is selected. Next, select your desired app(s) using the check boxes. Tap Uninstall (the trash icon), and then tap Uninstall when prompted to uninstall updates for the app(s).

Next, tap the Overview tab, and then tap Updates available. Tap Update next to the desired app or apps, or tap Update all at the top.

Safe mode will help determine if there is a recent third-party app that is causing an issue on your device. First, press and hold the Power button (or Side button) and the Volume down button at the same time. You can also swipe down from the top of the screen using two fingers, and then tap the Power icon.

Touch and hold Power off, and then tap Safe mode.

Once you're in Safe mode, you can remove third-party apps. Start by removing apps that were updated or installed when the problem started.

To exit Safe mode, simply restart your phone or tablet and it will reboot normally.

If the above steps did not resolve the issue, you can perform a factory data reset on your device. This reset will remove all data from your device. Before you perform a factory reset, be sure to back up your personal data, so you don't lose it all.

Navigate to and open Settings, then tap General management, and then swipe to and tap Reset. Tap Factory data reset, and then tap Reset at the bottom of the screen. Tap Delete all, and then enter your Samsung account credentials. Follow the prompts to finish resetting your device. When the device turns on again, you will need to complete the initial setup process.

Tap the switch next to the source that you want to allow app installations from, such as Chrome.
 

Your phone or tablet may prompt you with an option to allow Google to inspect installed apps for security. If enabled, this option may still prevent apps from installing. 

If this occurs, you can try going back to the app or file you'd like to install, and then try installing it again.