Minutes after the end of the WWDC 2018 presentation keynote, Apple's servers made available to the developers, the first betas of iOS 12, tvOS 12, macOS Mojave and watchOS 5. In general, the performance of all the betas is being more than good, especially in the iPhone, where the battery consumption is very similar to that of iOS 11, one of the fears of many users when installing the first beta of any version of iOS.
However, if you have tried to install the first beta of watchOS 5 over and over again, despite having the corresponding developer certificate, and there is no way to install it correctly, you should know that you are not the only one, since it is a general problem among many users, which has forced the company to remove it from its servers.
With the special care that Apple has in some aspects, it is especially striking that it has launched a version that no way to install in compatible Apple Watch models, and among which we do not find the first generation Apple Watch, a model that remains, three years after its launch, without updates.
The Cupertino-based company You have not specified the reasons that led you to withdraw the update, but seeing the problems that a large number of developers are presenting, it is not necessary to add 2 + 2 to know what the reason has been. On the Apple developer portal, we can see how the first beta of watchOS 5 is temporarily unavailable.
Unlike other updates, developers who have tried to install this watchOS update have not suffered no problem causing your device to crash and it will be completely unusable, as if it has happened on more than one occasion with other devices when something has failed in the update.