This is an error that occurs when the upper limit of BrowserStack parallels has been used up.
If it reaches the upper limit, it will wait for a short time, and the error will occur if the number of parallels is not empty after waiting for this period of time.
If the agreement for the maximum parallels in BrowserStack is for 1 or 2 parallels, and the MagicPod side runs at 3 parallels, there is a high probability that this error is occurring because the number of parallels on the BrowserStack side is insufficient.
Even if the number of parallels is insufficient, BrowserStack waits for a while, so this error may not appear if the test is run at an early stage.