I understand you already use /e/OS and some installed apps,
I hope your device is running Latest Samsung Firmware that is based on Android 9.0 (Pie),
And got a fonctionnal recovery manager installed.
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Donwnload Latest /e/ image (without errors or pause) from here :
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dev /e/OS dev dreamlte download
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stable /e/OS stable dreamlte download
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boot into recovery mode,
and just install the .ZIP file (TWRP),
or Apply update using the .ZIP file (recovery-e),
from internal or external SDcard memory…
as explained here : steps (8) or (9) of this user friendly guide :
BUT WITHOUT FACTORY-RESET OR WIPING OR FORMATING ANYTHING
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Also read official documentation here :
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Info about Samsung Galaxy S8 - dreamlte
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Install /e/OS on a Samsung Galaxy S8 - “dreamlte”