Unhandled exception on refresh mirror

[nothingislost]

I'm using the following settings:

And on MacOS, the "Refresh Mirror" command leads to two unhandled exceptions:

VM15122:1 css

VM15122:1 Uncaught (in promise) Error: EISDIR: illegal operation on a directory, read
Promise.then (async)
u @ VM15122:1
eval @ VM15122:1
l @ VM15122:1
eval @ VM15122:2
eval @ VM15122:2
(anonymous) @ original-fs.js:171
app.js:26894 Uncaught (in promise) Error: File already exists.
    at t.<anonymous> (app.js:26894)
    at app.js:5780
    at Object.next (app.js:5793)
    at s (app.js:5678)
(anonymous) @ app.js:26894
(anonymous) @ app.js:5780
(anonymous) @ app.js:5793
s @ app.js:5678
Promise.then (async)
l @ app.js:5696
(anonymous) @ app.js:5698
o @ app.js:5675
t.create @ app.js:26884
eval @ VM15122:2
o @ VM15122:1
Promise.then (async)
u @ VM15122:1
eval @ VM15122:1
l @ VM15122:1
eval @ VM15122:2
eval @ VM15122:2
(anonymous) @ original-fs.js:171

app.js:26894 Uncaught (in promise) Error: File already exists.
    at t.<anonymous> (app.js:26894)
    at app.js:5780
    at Object.next (app.js:5793)
    at s (app.js:5678)
(anonymous) @ app.js:26894
(anonymous) @ app.js:5780
(anonymous) @ app.js:5793
s @ app.js:5678
Promise.then (async)
l @ app.js:5696
(anonymous) @ app.js:5698
o @ app.js:5675
t.create @ app.js:26884
eval @ VM15122:2
o @ VM15122:1
Promise.then (async)
u @ VM15122:1
eval @ VM15122:1
l @ VM15122:1
eval @ VM15122:2
eval @ VM15122:2
(anonymous) @ original-fs.js:171