SVG Circle not animated in Edge - animation

Question

The below svg animates perfectly in all browsers but Edge (surprise!).
<svg width="80" height="24" viewBox="0 0 120 30" xmlns="http://www.w3.org/2000/svg" fill="#555">
<circle cx="15" cy="15" r="15">
<animate attributeName="r" from="15" to="15"
begin="0s" dur="0.8s"
values="15;9;15" calcMode="linear"
repeatCount="indefinite" />
<animate attributeName="fill-opacity" from="1" to="1"
begin="0s" dur="0.8s"
values="1;.5;1" calcMode="linear"
repeatCount="indefinite" />
</circle>
</svg>
I tried adding px as units but no luck.
Thanks for your tips!

Answer 1

I try to check your code and refer to the MDN documentation.
I can see that you are using animate, attributeName, from, to, dur attributes in your code.
Animate is supported in Edge version <=79.
Whereas compatibility is unknown for attributeName, from, to, dur
Reference:
SVG Animate
I think this is the reason why your code is not working in the MS edge legacy browser.
I suggest you recommend your clients use the MS Edge Chromium browser or you can remove the animation or show the image in place of animation to avoid the issue.

Answer 2

After reading the comments and answers I decided to go for clear CSS animation, instead of SVG. I grabbed the code from https://projects.lukehaas.me/css-loaders/ and my "solution" looks like this:
<style>
.loader,
.loader:before,
.loader:after {
border-radius: 50%;
width: 2.2em;
height: 2.2em;
-webkit-animation-fill-mode: both;
animation-fill-mode: both;
-webkit-animation: load7 1.3s infinite ease-in-out;
animation: load7 1.3s infinite ease-in-out;
}
.loader {
color: #888;
font-size: 10px;
margin: 80px auto;
position: relative;
text-indent: -9999em;
-webkit-transform: translateZ(0);
-ms-transform: translateZ(0);
transform: translateZ(0);
-webkit-animation-delay: -0.16s;
animation-delay: -0.16s;
}
.loader:before,
.loader:after {
content: '';
position: absolute;
top: 0;
}
.loader:before {
left: -3.5em;
-webkit-animation-delay: -0.32s;
animation-delay: -0.32s;
}
.loader:after {
left: 3.5em;
}
#-webkit-keyframes load7 {
0%,
80%,
100% {
box-shadow: 0 2.2em 0 -1.3em;
}
40% {
box-shadow: 0 2.2em 0 0;
}
}
#keyframes load7 {
0%,
80%,
100% {
box-shadow: 0 2.2em 0 -1.3em;
}
40% {
box-shadow: 0 2.2em 0 0;
}
}
</style>
<div class="loader">Loading...</div>