> For the complete documentation index, see [llms.txt](https://docs.alemba.com/asm-legacy-product-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.alemba.com/asm-legacy-product-documentation/setup-and-configure-asm/installation-and-upgrade/eos-installation-guide/eos-known-issues.md).

# EOS Known Issues

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## Installation failed on health-status page validation

<figure><img src="/files/B8WDsksw83EinQulg4XT" alt=""><figcaption></figcaption></figure>

ASM depends upon .Net Core 5 for some services and will install version 5.0.7 by default.

Due to known problems with .Net Core when IIS configuration is changed, the ASM installer is designed to reinstall .Net Core every time the install runs.  This usually leads to trouble free installation.

Over time, newer versions of .Net Core will be released and system administrators can opt to install those versions instead.  In that case, errors like the above may occur after installation of ASM.

If a version of .Net Core 5 greater than 5.0.7 is installed on the application server, it is recommended to reinstall .Net Core after installing.