Try
Copy the formula in I2 down to cover the max possible returns.
<b></b><table cellpadding="2.5px" rules="all" style=";background-color: rgb(255,255,255);border: 1px solid;border-collapse: collapse; border-color: rgb(187,187,187)"><colgroup><col width="25px" style="background-color: rgb(218,231,245)" /><col /><col /><col /><col /><col /></colgroup><thead><tr style=" background-color: rgb(218,231,245);text-align: center;color: rgb(22,17,32)"><th></th><th>E</th><th>F</th><th>G</th><th>H</th><th>I</th></tr></thead><tbody><tr ><td style="color: rgb(22,17,32);text-align: center;">1</td><td style=";">number </td><td style=";">discription</td><td style="text-align: right;;"></td><td style=";">most errors</td><td style="text-align: right;;"></td></tr><tr ><td style="color: rgb(22,17,32);text-align: center;">2</td><td style="text-align: right;;">1</td><td style=";">error 146</td><td style="text-align: right;;"></td><td style="text-align: right;;">7</td><td style=";">error 23</td></tr><tr ><td style="color: rgb(22,17,32);text-align: center;">3</td><td style="text-align: right;;">5</td><td style=";">error 887</td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style=";">error 581</td></tr><tr ><td style="color: rgb(22,17,32);text-align: center;">4</td><td style="text-align: right;;">7</td><td style=";">error 23</td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style=";">error 780</td></tr><tr ><td style="color: rgb(22,17,32);text-align: center;">5</td><td style="text-align: right;;">6</td><td style=";">error 907</td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style=";"></td></tr><tr ><td style="color: rgb(22,17,32);text-align: center;">6</td><td style="text-align: right;;">2</td><td style=";">error 847</td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style=";"></td></tr><tr ><td style="color: rgb(22,17,32);text-align: center;">7</td><td style="text-align: right;;">1</td><td style=";">error 602</td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style=";"></td></tr><tr ><td style="color: rgb(22,17,32);text-align: center;">8</td><td style="text-align: right;;">7</td><td style=";">error 581</td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td></tr><tr ><td style="color: rgb(22,17,32);text-align: center;">9</td><td style="text-align: right;;">4</td><td style=";">error 239</td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td></tr><tr ><td style="color: rgb(22,17,32);text-align: center;">10</td><td style="text-align: right;;">7</td><td style=";">error 780</td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td></tr></tbody></table><p style="width:4.8em;font-weight:bold;margin:0;padding:0.2em 0.6em 0.2em 0.5em;border: 1px solid rgb(187,187,187);border-top:none;text-align: center;background-color: rgb(218,231,245);color: rgb(22,17,32)">Sheet4</p><br /><br /><table width="85%" cellpadding="2.5px" rules="all" style=";border: 2px solid black;border-collapse:collapse;padding: 0.4em;background-color: rgb(255,255,255)" ><tr><td style="padding:6px" ><b>Worksheet Formulas</b><table cellpadding="2.5px" width="100%" rules="all" style="border: 1px solid;text-align:center;background-color: rgb(255,255,255);border-collapse: collapse; border-color: rgb(187,187,187)"><thead><tr style=" background-color: rgb(218,231,245);color: rgb(22,17,32)"><th width="10px">Cell</th><th style="text-align:left;padding-left:5px;">Formula</th></tr></thead><tbody><tr><th width="10px" style=" background-color: rgb(218,231,245);color: rgb(22,17,32)">H2</th><td style="text-align:left">=LARGE(<font color="Blue">E2:E10,1</font>)</td></tr></tbody></table></td></tr></table><br /><table width="85%" cellpadding="2.5px" rules="all" style=";border: 2px solid black;border-collapse:collapse;padding: 0.4em;background-color: rgb(255,255,255)" ><tr><td style="padding:6px" ><b>Array Formulas</b><table cellpadding="2.5px" width="100%" rules="all" style="border: 1px solid;text-align:center;background-color: rgb(255,255,255);border-collapse: collapse; border-color: rgb(187,187,187)"><thead><tr style=" background-color: rgb(218,231,245);color: rgb(22,17,32)"><th width="10px">Cell</th><th style="text-align:left;padding-left:5px;">Formula</th></tr></thead><tbody><tr><th width="10px" style=" background-color: rgb(218,231,245);color: rgb(22,17,32)">I2</th><td style="text-align:left">{=IF(<font color="Blue">ROWS(<font color="Red">I$2:I2</font>)>COUNTIF(<font color="Red">$E$2:$E$10,$H$2</font>),"",INDEX(<font color="Red">$F$2:$F$10,SMALL(<font color="Green">IF(<font color="Purple">$E$2:$E$10=$H$2,ROW(<font color="Teal">$F$2:$F$10</font>)-ROW(<font color="Teal">$F$2</font>)+1</font>),ROWS(<font color="Purple">I$2:I2</font>)</font>)</font>)</font>)}</td></tr></tbody></table><b>Entered with Ctrl+Shift+Enter.</b> If entered correctly, Excel will surround with curly braces {}.
<b>Note: Do not try and enter the {} manually yourself</b></td></tr></table><br />