You're trying to animate using a spring using a duration of more than 10 seconds and receiving this message.

animate(
  element,
  { filter: "blur(0)" },
  { type: "spring", duration: 20, bounce: 0 }
)

Explanation

When defining a spring via duration, Motion has to "find" a spring of the defined bounciness that finishes as close to this duration as possible.

An undamped spring lasts for an infinite amount of time and this kind of spring would be impossible to "search" for. Given also the incompatibility there with the bounce option, and the performance implications of finding a spring with the longer duration, a limit is placed on duration. This is currently 10 seconds.

Solution

Use visualDuration

Visual duration is the amount of time an animation appears to take to reach its target, with the remaining oscillation happening after this duration has elapsed.

This makes it easier to edit the feeling of a spring with bounce alone, and coordinating the duration of a spring animation so it visually matches other non-spring animations.

You can use Motion Studio to visually play with the difference between duration and visualDuration.

Additionally, Motion can derive spring properties directly from visualDuration and bounce. It doesn't need to "find" a spring. Therefore visualDuration doesn't come with the same performance considerations and is therefore uncapped.

animate(
  element,
  { filter: "blur(0)" },
  { type: "spring", visualDuration: 20, bounce: 0 }
)

Use physics-based springs

If you want a spring that lasts for an Infinity duration, then this is an undamped spring.

To create this kind of spring, set damping to 0:

animate(
  element,
  { filter: "blur(0)" },
  { type: "spring", stiffness: 200, damping: 0 }
)