If i install kiali with the recommended settings for istio 1.8 it causes an error in the logs tab of any pod, if its logs are empty.
Kiali Installation:
kubectl apply -f https://raw.githubusercontent.com/istio/istio/release-1.8/samples/addons/kiali.yaml
Error:
TypeError: Cannot read property 'length' of undefined
at a.n.hasEntries (main.45aa7d55.chunk.js:1)
at a.n.getAppDiv (main.45aa7d55.chunk.js:1)
at a.n.getSplitter (main.45aa7d55.chunk.js:1)
at a.value (main.45aa7d55.chunk.js:1)
at Fa (2.45dcf362.chunk.js:2)
at Na (2.45dcf362.chunk.js:2)
at gc (2.45dcf362.chunk.js:2)
at us (2.45dcf362.chunk.js:2)
at cs (2.45dcf362.chunk.js:2)
at Zc (2.45dcf362.chunk.js:2)
Versions used
Kiali: 1.26-1.27
Istio: 1.8
Minikube: v1.15.1 on Microsoft Windows 10 Pro 10.0.19042 Build 19042
Kubernetes: v1.19.4
Docker: 19.03.13

I just realized that it happens here too, I am using istio 1.8, kubernetes 1.16.15 at GKE and the same kiali instalation as you
Thanks for reporting, we'll look into this one shortly.
The workaround is to update to a newer Kiali, it is fixed already in 1.27+. The fix will be made to 1.26 and we will make a patch release such that 1.8 users will get the fix.
We have released Kiali v1.26.2 with the fix. Istio 1.8 users installing Kiali as an addon should now be getting the updated version.